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Forbid multi-vector MSI interrupt vectors migration to another CPU once

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allocated. MSI have strict vectors allocation requirements, which are not
satisfied now during reallocation. This is not the best possible solution,
but better then just broken, as it was.

No objections: current@, arch@, jhb@
This commit is contained in:
Alexander Motin 2009-06-15 13:47:49 +00:00
parent 164e1f20ec
commit bb74c2db4d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=194237
2 changed files with 4 additions and 0 deletions
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2
sys/amd64/amd64/msi.c
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@ -210,6 +210,8 @@ msi_assign_cpu(struct intsrc *isrc, u_int apic_id)
old_id = msi->msi_cpu;
if (old_vector && old_id == apic_id)
return;
if (old_vector && !msi->msi_msix && msi->msi_first->msi_count > 1)
return;
/* Allocate IDT vector on this cpu. */
vector = apic_alloc_vector(apic_id, msi->msi_irq);
if (vector == 0)

2
sys/i386/i386/msi.c
View file

@ -210,6 +210,8 @@ msi_assign_cpu(struct intsrc *isrc, u_int apic_id)
old_id = msi->msi_cpu;
if (old_vector && old_id == apic_id)
return;
if (old_vector && !msi->msi_msix && msi->msi_first->msi_count > 1)
return;
/* Allocate IDT vector on this cpu. */
vector = apic_alloc_vector(apic_id, msi->msi_irq);
if (vector == 0)